1. Operators which are the difference of two projections;Andruchow;J. Math. Anal. Appl.,2014
2. The Grassmann manifold of a Hilbert space;Andruchow,2014
3. Hopf–Rinow theorem in the Sato Grassmannian;Andruchow;J. Funct. Anal.,2008
4. Lagrangian Grassmannian in infinite dimension;Andruchow;J. Geom. Phys.,2009
5. Essentially commuting projections;Andruchow;J. Funct. Anal.,2015